I accidentally Potterlock. Whoops. Also managed to avoid the usual House arguments, because I am craftily non-confrontational like that.
"Sherlock, this is amazing!" John's gleeful shout carried out over the garden to Sherlock, who was idly prodding a small toad with his wand. "I can actually practice flying out here, without worrying about anyone seeing me!"
With a whoop, he looped his broom close enough to Sherlock's head to tangle a few errant curls before landing on the ground with a soft thud.
"Thank you so much for inviting me to your house for the summer, Sherlock. Are you sure your parents don't mind?"
"They're just shocked anyone was willing to spend time with me. Mummy's over the moon." Sherlock grinned before turning his attention back to the toad, which was turning an alarming shade of violet.
"Sherlock! You're not supposed to be doing magic outside of school!"
Sherlock just scoffed. "If they do actually track me, Mycroft will sort it out. Having your brother work at the Ministry is handy like that."
John rolled his eyes and took flight again, kicking off with his heels.
"In that case, go find a ball or something and make it chase me – I could use the practice. Going for team captain next year!"
Summoning a tatty old football from who-knows-where, Sherlock glanced up into the sky and settled down at the far end of the lawn, chasing John with the improvised bludger.
